cos 38 × cos 52 -sin 38×sin 52
Answers
Answered by
5
cos38•cos52 - sin38•sin52
= cos(38+52)
= cos 90
= 0
= cos(38+52)
= cos 90
= 0
Answered by
13
hi frnds......
cos 38 * cos 52 - sin 38 * sin 52
⇒ cos (90- 38) * cos 52 - sin (90- 38) * sin 52
⇒ sin 52 * cos 52 - cos 52 * sin 52
[ arrange ]
⇒sin 52 * cos 52 - sin 52 * cos 52
⇒ 0
hope this helps........ :D
cos 38 * cos 52 - sin 38 * sin 52
⇒ cos (90- 38) * cos 52 - sin (90- 38) * sin 52
⇒ sin 52 * cos 52 - cos 52 * sin 52
[ arrange ]
⇒sin 52 * cos 52 - sin 52 * cos 52
⇒ 0
hope this helps........ :D
rita01:
⇒ 0
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